The mass dependence of the overshooting parameter determined from eclipsing binary data

Authors

  • Ignasi Ribas,

    Corresponding author
    1. Departament d'Astronomia i Meteorologia, Universitat de Barcelona, Av. Diagonal 647, E-08028 Barcelona, Spain
    2. Department of Astronomy and Astrophysics, Villanova University, 800 Lancaster Ave., Villanova, PA 19085, USA
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  • Carme Jordi,

    1. Departament d'Astronomia i Meteorologia, Universitat de Barcelona, Av. Diagonal 647, E-08028 Barcelona, Spain
    2. Institut d'Estudis Espacials de Catalunya, Edif. Nexus-104, Gran Capità 2-4, E-08034 Barcelona, Spain
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  • Álvaro Giménez

    1. Instituto de Astrofísica de Andalucía, CSIC, Apartado 3004, E-18080 Granada, Spain
    2. Laboratorio de Astrofísica Espacial y Física Fundamental, Apartado 50727, E-28080 Madrid, Spain
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★ E-mail: iribas@ast.villanova.edu

Abstract

High-precision data on absolute dimensions of evolved eclipsing binaries have been used for a quantitative evaluation of the significance of convective overshoot in the stellar core. Eight detached double-lined eclipsing binaries with components close to or beyond the terminal age main sequence (TAMS) and masses between 2 and 12 M have been compared with evolutionary models using different overshooting parameters. The results are robust and indicate a systematic increase of the amount of convective overshoot with the stellar mass. Such determination constitutes a fundamental point for stellar structure and evolution theory.

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